C O N T R O V E R S I A L
I for one am glad Tera stayed and think a metagame with Tera is fine.. it’s very fun, encourages diverse play, and dynamic, if less competitive due to less predictability.
Regrettably you might see the loss of a lot of otherwise fine Pokémon, due to their ability to abuse Tera more than others.
It’ll be interesting to see if Tera remains in OU, we might see a banlist of 10+ Pokémon such as Lele, kartana
that otherwise would be fine without Tera! Still happy to play that kind of metagame
thay said..

chi-yu is broken with or without tera

Chien pao trades a lower BP secondary STAB for significantly more speed, and is possibly not far behind in brokenness. Will become more dominant as OU fills up

this might not be broken, its “extremely strong”, similar to Weavile last gen. Tho with Tera it might be considered over the edge. Over time it will be more manageable as OU fills up

gholdengo has felt less broken over time, as it seems gameplay is adapting to it, there’s also a hard check to the whole strategy with the newly released court change Cinderace. More defog users will be coming soon that beat it. All that said tho it’s probably on the radar.

shed Tail is a little ridiculous when it’s used woth 375 speed and regenerator, as well as
actual utility moves to support it (rapid spin, u turn, knock off)

if this is great despite all the dark types in OU, what happens as the dark types are diluted with new Pokémon coming in. Interestingly it’s very Tera-independent, not needing it at all or caring about most Pokémon using Tera against it, due to the way specs shadow ball works, and very obvious Tera plays to check that.